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About the MartinLogan Motion SLM X3

Space-saving way to create a front soundstage for your TV setup

Most sound bars that we offer are completely self-contained, self-powered speaker systems. The MartinLogan SLM X3 sound bar is a different animal. Sure, it sports a slim, low-profile look that fits neatly into a TV setup. But it relies on the power (and TV connections) of a separate home theater receiver.

Space-saving way to create a front soundstage for your TV setup

Most sound bars that we offer are completely self-contained, self-powered speaker systems. The MartinLogan SLM X3 sound bar is a different animal. Sure, it sports a slim, low-profile look that fits neatly into a TV setup. But it relies on the power (and TV connections) of a separate home theater receiver.

This passive loudspeaker takes the place of the front three speakers in a traditional home theater setup. The cabinet is under 2" thick, so you can wall-mount it below a flat-panel TV and maintain a sleek, elegant look. And since MartinLogan didn't have to pack amplification and extra circuitry inside, they've turned all their attention to the high-performance drivers.

Surprisingly full sound from a super-thin design

MartinLogan includes some of their most innovative drivers to make the most of the space they have. The headliners are the three Folded Motion™ tweeters — thin, accordion-like pleated diaphragms "squeeze" air to create sound. These tweeters are favorites here at Crutchfield for their focused and natural sound.

But you could argue that the heavy-lifters are the six 4" ultra-slim mid/woofers. Somehow within the SLM X3's thin cabinet, these drivers manage to deliver some serious midrange and bass. The result is full, dynamic sound that makes movies and music more enjoyable and engaging.

But while this speaker is powerful for a sound bar, Steve cautions against using it in a super-large projection situation. "A projector system is at its most immersive when the size of the picture and sound are in sync," he said. "Since the bar is only 48" wide, the sound might not match up quite right with a screen 120" or larger."

Create a full MartinLogan surround system

One advantage to using a passive sound bar versus a powered one? It's pretty easy to build onto it later. You can add MartinLogan's Motion FX on-wall speakers as complementary, voice-matched surrounds. And you should definitely consider a MartinLogan powered subwoofer for theater-worthy bass.

3 Folded Motion Tweeters: Three of MartinLogan's Folded Motion
tweeters help give the Motion SLM X3 its natural, realistic high frequency
sound. Lightning fast transient response, combined with a large surface area
(8x that of a typical 1" dome tweeter) creates clear, dynamic, and precise
sound. The 1" x 1.4" Folded Motion tweeters work by moving air (which
creates sound) perpendicular to the folded ridges of the diaphragm, similar
to how an accordion works. This extremely low mass diaphragm "squeezes" air
and requires almost 90% less excursion than the typical 1" dome tweeter,
which drastically minimizes distortion while providing a lightning fast
response time. The increased surface area also provides a wide, yet
controlled sound dispersion (80°x80°)
to create a realistic and carefully etched sound stage.

Precision Crossovers: To seamlessly blend the audio output
from the high frequency driver (tweeter) and the midbass drivers (woofers), the
Motion SLM X3 features a precision 3000Hz crossover utilizing custom air core
coil and low DCR steel laminate inductors, polyester film capacitors in series,
and low DF electrolytic capacitors in parallel.

Ultra-Slim Sealed Cabinet: The Motion SLM X3 features an
ultra-slim sealed cabinet with a high-gloss black finish and comes with a
magnetic black cloth grille. Hidden discretely underneath the magnetic grille,
the drivers are held securely in place by a solid, black-anodized brushed
aluminum baffle.

3 Pair Of Spring-Post Terminals: The SLM X3 is equipped with a set of
spring-post terminals for each channel to connect to your AV receiver's Front
Left, Front Right, and Center speaker output terminals. These spring-post
terminals will accept bare speaker wire from 16AWG to 12AWG. Due to the position
of the spring-post terminals they will not accept banana plugs or
pin-connectors. The SLM X3 is compatible with 4, 6, and 8 ohm compatible
receivers and amplifiers.

Mounting Options: With keyhole slots on the passive soundbar speaker's
back panel that attach easily to the included wall bracket, the SLM X3 can be
wall-mounted under or above your flat-panel TV. While MartinLogan created the
Motion SLM X3 soundbar to wall mount next to flat-panel TVs, that's not its only
application. Included with the passive soundbar speaker are feet that allow it
to sit on a shelf or equipment cabinet.